i just have a normal sport bike, and my all out is either pumping super hard over bumpy, clumpy, dirt field ( having no choice, cause if im not going fast enough ill fall over.... ) or going up hill, usually against wind...and my god i just did that ( first time trying HIIT ) and i am gone right now...i cant beleive my fingers have the strength to type this. i feel like i drained all the energy from my body, and i must say......i love the feeling. cant wait to be sore as hell tomorrow, that feels even better.

cant wait till i get a job, so i can ride my bike to work. man i love to ride my bike places. even when i do get a car, i hope im still in the right state of mind to want to ride my bike to the grocery store. my neighboorhood store is within walking distance of my house, and i find it pretty sad that people take their cars. i even saw this lady who has a decent sized driveway, who drove her car to the end of her driveway just to get her mail...just walk gosh

Bicycling is a addiction. My cannondale has seen more miles than my car. Before you know it you will feel guilty if you even drive your car. People will ask if you want a ride, and you will choose your bike. Weather will be no object either, you will find yourself biking in rain, snow, sleet, and you will love it for the challenge. You will laugh at the people in grid lock traffic as you whizz by in the third of the time. You will slide down allys, cars drivers wouldnt fathom to go. The bicycle will become you, and you the bicycle, a mere extension of your limbs. Ok, I am a bit of a bike nut, I do admit. But it is a wonderful form of cardio and transportation. I have loved it for years, and I commute almost exclusivly on a bicycle, and have for years. I have panners I put on to pick up groceries etc. You see the world in a whole new way from a bicycle.

I do agree with on how lazy people can be. I say why drive, when you can walk, and bike. I see people circle blocks over and over again, so they can find the perfect parking spot. We talk about exercise so much, but there are real simple ways to stay fit. Its called walking and biking for normal things in life. It is no wonder why obesity is such a problem nowdays. If one eats a clean diet, and walks and bikes as much as they can for there everyday living, I would imagine the actual workout regime wouldnt have to be alot, for maintance anyway.

Plus whats better than taking your bike to do your errands, and you be guilt-free, no emmisons, no oil. Only thing burned is calories and fat.

is Hiit on a bike as effective at burning fat and calories as running doing hiit

My guess is yes. It's all about the heart rate so if you are able to get the heart rate as high on a bike as running than it is just as effective. Also it probably won't wear down your joints as much as running either which is a plus.